Let's log a stack trace so that we can see where the damn error is, instead

of having an error triggered right after this one that happens to print
a stack trace look like the matching stack trace for the original error.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3679 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/whirled/server/SceneRegistry.java

@@ -273,6 +273,7 @@ public class SceneRegistry
     {
         Log.info("Failed to resolve scene [sceneId=" + sceneId +
                  ", cause=" + cause + "].");
+        Log.logStackTrace(cause);
 
         // alas things didn't work out, notify our penders
         ArrayList penders = (ArrayList)_penders.remove(sceneId);